419520221 has 4 divisors (see below), whose sum is σ = 419626812. Its totient is φ = 419413632.

The previous prime is 419520197. The next prime is 419520239. The reversal of 419520221 is 122025914.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122025914 = 2 ⋅61012957.

It can be written as a sum of positive squares in 2 ways, for example, as 255552196 + 163968025 = 15986^2 + 12805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-419520221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (419520121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47156 + ... + 55341.

It is an arithmetic number, because the mean of its divisors is an integer number (104906703).

Almost surely, 2^419520221 is an apocalyptic number.

It is an amenable number.

419520221 is a deficient number, since it is larger than the sum of its proper divisors (106591).

419520221 is a wasteful number, since it uses less digits than its factorization.

419520221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106590.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 419520221 is about 20482.1927781183. The cubic root of 419520221 is about 748.6019710467.

The spelling of 419520221 in words is "four hundred nineteen million, five hundred twenty thousand, two hundred twenty-one".